The UN's assessment of the so called elections is correct:
"the electoral process is so tightly controlled that the final phase, the voting itself, could be dispensed with without the final result being substantially affected"

For the local elections candidates are nominated in open meetings run by the
CDR
(Committees to Defend the Revolution) [1]
that are closely linked to police and security forces. They report and sanction dissent. Prison terms of 4 years threaten those that openly oppose the regime [2]
in that public meeting filled with informants. People not supporting can be threatened with losing their home [3], job, ....

These "candidates" then are to be approved by "electoral committees" stuffed with representatives of the
communists front organizations (see the Cuban electoral law) [4].
For national elections the local "elected candidates" at the local level can "select" candidates from a restricted list drawn up by the communist front organizations [5].